Stone tools found in a Florida river show that humans settled the southeastern United States far earlier than previously believed—perhaps by as much as 1,500 years.
Published in the journal Science Advances, the findings come from excavation of the Page-Ladson site near Tallahassee, an archaeological site that is 26 feet underwater in a sinkhole on the Aucilla River. The site was first investigated from 1987 to 1997, but the original findings, which included eight stone tools and a mastodon tusk with apparent cut marks, were dismissed.
